Dial Up Modem Sounds, from 300 bps to 56K
522,373
Publicado 2022-01-30
Note that this isn't intended to be an exhaustive list of all speeds, but a sample of the most common ones. There are many other speeds and protocols, including but not limited to 75, 110, 4800, 28,800, etc. Also note that this video includes a V.90 56K negotiation, which is the one that people are most likely to find familiar. With that said, if it doesn't sound quite right, remember that V.90 deprecated the X2 and Flex 56K standards, which sound quite different.
All but the 56K connection is made through a Teltone TLS-4 telephone line simulator, essentially a 'telephone network in a box'. 56K connections require that the server side be connected digitally, so a Teltone ILS-2000 is used instead, which does the same job but for ISDN (read: digital) phone devices. In this configuration the analog 56K modem is connected to the network via a DIVA T/A ISDN terminal.
Server Specs:
- Cobalt Qube 2
- MIPS RM5231-250Q CPU @ 250MHz
- 128MB EDO RAM
- 13GB Quantum Fireball IDE HDD
- 2x 10/100 Ethernet Ports
- Custom RedHat Linux OS
- Startech PCI2S550 2x Serial Port PCI Card
Laptop Specs:
- Toshiba Tecra 500CDT
- Intel Pentium @ 120MHz
- 144MB EDO RAM
- 1.2GB IDE HDD
- 12.1" 800x600 Active Matrix TFT LCD
Modems:
- Lexicon LEX-11 300 baud acoustically coupled modem
- USR Sportster 1200 Modem
- USR Sportster 2400 Modem
- USR Sportster 9600 Modem
- USR Sportster 14,400 Fax Modem
- USR Sportster 33.6 Fax Modem
- USR Sportster 56K Fax Modem
0:00 Intro
0:04 300 bps Bell 103
0:19 1200 bps V.22
0:31 2400 bps V.22bis
0:46 9600 bps V.32
1:02 14,400 bps V.32bis
1:19 33,600 bps V.34
1:36 56 Kbps V.90
Todos los comentarios (21)
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why does the V.90 56k have two bell sounds before it continues the training?
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It's so weird hearing some of these playing so briefly; I'm used to the handshaking taking at least 30 seconds.
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The fact that someone invested its time to acuratelly transcribe the modem noises into subtitles, made me smile. Laughed my ass off LOL, I might have a problem.
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In 1982 I built a 300 baud modem from a schematic in Popular Electronics. The hard part was that I had to tune it and I had nothing to tune it with. So I called up a local BBS over and over and held down a key on the computer while I turned the potentiometer back and forth. It took several calls until by chance I hit the right frequency and the key echoed back.
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I love how it progressively adds more stuff to the end, going from simple dial tones to the handshakes you hear with 56k. I was born at the peak of 56k and by the time I was old enough to use the family computer, we already had Charter cable internet.
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I kept waiting for the "Welcome" sound from AOL at the end of the 56K connection 😄
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Not only the sounds, but the whole setup was nicely and neatly done, demonstrating the speed of the monitor renders, too. Excellent. 🎉
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Those were the days :) remember hosting my BBS and seeing my friends phone number with something weird like 1200/75 connection, calling him asking wtf he’s trying to connect with giving those weird setups… and him answering that he was screaming and whistling, thinking my BBS had pre-connection audio on. So apparently humans can successfully perform some of the modem handshakes.
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I was terrified of these sounds as a kid. I could hear my parents using it in the next room after I’d gone to bed and had no idea what it was. To this day I still find it pretty creepy!
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What most people don't realize is the hardest one of those to get working was the 56K connection since it requires digital on one side (hence the ISDN modem). BRAVO!
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Those sounds are seared into my memory, ever since using a 1200 baud dialup to Compuserve in the 80s and 2400 baud to 14.4k BBSes in the early 90s.
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That hollow echo for 56K was the sweetest sound. Until line quality degraded and then it switched to the static with slightly quieter static for 33.6. If it repeated the static again, but without the quieter one, it was time to break and redial.
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The 56k dialup tone is really bringing back memories of using my mom’s clunky Dell laptop to connect to AOL and hop on RuneScape :)
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This is the kind of cool stuff I like to see on YouTube. Definitely V.90 56K was most familiar to me! I'm surprised to see how fast the connection process was at the lower baud rates though, I guess there was less to negotiate once the connection was made.
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Ahhh...the sounds of my entire childhood in one youtube video.
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It's amazing how sounds can invoke so many great memories. Being in on the relative beginnings of the internet was a great time!
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My first ever interaction with a modem was in 1978 at the tender age of 15. We connected our high school DECwriter to a PDP-11 at 300 baud via an acoustic coupler. As I recall, there was a switch to select between 110 and 300 baud, so we had the fast setting. I still remember the modem sound along with that awesome dot-matrix sound of the DECwriter. That was a much simpler time. Thanks for the memories!
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It's fun watching this having previously watched a video breaking down what each tone is doing on the 56k and seeing how it progressed over the years into the more complex series of handshakes and screeches it ends up being at the end
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Awesome! I had been hoping to finally hear all these recorded with the original equipment.
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oh the nostalgia this had on me, thank you so much for posting this, as a kid from the 80's and 90's this brought me so much joy! It reminded me how we had to wait until midnight to dial because you didn't need to pay for pulses after midnight, those were the days!!!
